22RE: cold start screech/squeal

I read the Avalon squeel post, I got it too!
======================================

'85 Celica GT, 297K miles, all stock:

1. At weather temps below 45 degrees, engine starts normally, but has a
high-pitched, screech/squeal noise. With the hood raised, the sound
"seems" to be in the area near the fuel injection rail (?). If the gas
pedal is quickly "stomped" and released, the noise stops. When the
weather is warmer, no noise at start-up.
2. Clue (?): When cold, the throttle pedal cable won't move freely, it
"sticks," needs to be stepped-on to operate smoothly.
3. Clue (?): When engine is cold, the engine RPMs will drop, almost
stalling-out, when the brake pedal is pressed. But, engine operates fine
when warmed-up. Plugs, wires, dist. cap & rotor are new. Any ideas?
Thanks, da

"Doug Allen" <imloafin@webtv.net> wrote in message
news:16106-43DF0874-1416@storefull-3232.bay.webtv.net...[color=blue]
>I read the Avalon squeel post, I got it too!
> ======================================
>
> '85 Celica GT, 297K miles, all stock:
>
> 1. At weather temps below 45 degrees, engine starts normally, but has a
> high-pitched, screech/squeal noise. With the hood raised, the sound
> "seems" to be in the area near the fuel injection rail (?). If the gas
> pedal is quickly "stomped" and released, the noise stops. When the
> weather is warmer, no noise at start-up.
> 2. Clue (?): When cold, the throttle pedal cable won't move freely, it
> "sticks," needs to be stepped-on to operate smoothly.
> 3. Clue (?): When engine is cold, the engine RPMs will drop, almost
> stalling-out, when the brake pedal is pressed. But, engine operates fine
> when warmed-up. Plugs, wires, dist. cap & rotor are new. Any ideas?
> Thanks, da[/color]

have you tried spraying the drive belts with water while it is squealing, if
this stops it then you know what to fix.

If the above doesn't do it, then get a can of carb cleaner and spray it
round the area the sound appears to be coming from, any change of engine
speed may be an air leak, I have known these to make a squeal like sound,
particularly if it is a paper gasket failure.

the second of the above is consistent with your engine slowing down when
the brake pedal is pressed (i.e. it gets even weaker)

mrcheerful

hi mrcheerful, thanks for the reply & info.

All three belts are in good shape with low miles, I'll re-inspect them
for sufficient tension.

The screech isn't at the front of the engine in the belt area, it's
somewhere near the injection rail or below the throttle cable bracket. A
car tech pal suspects a vacuum leak; suggested changing all the small
hoses (since they are 21 years old) to stop the low RPM in cold weather
when the brake pedal is pressed.

I'll inspect all gaskets, too.

BTW, I have an '83 Celica GT with 350K miles, it never had the screech
sound - not yet!

======================================
From: [email]nbkm57@hotmail.com[/email] (mrcheerful*.)

have you tried spraying the drive belts with water while it is
squealing, if this stops it then you know what to fix.

If the above doesn't do it, then get a can of carb cleaner and spray it
round the area the sound appears to be coming from, any change of engine
speed may be an air leak, I have known these to make a squeal like
sound, particularly if it is a paper gasket failure.

the second of the above is consistent with your engine slowing down when
the brake pedal is pressed (i.e. it gets even weaker)
mrcheerful

On Tue, 31 Jan 2006 01:49:24 -0500, [email]imloafin@webtv.net[/email] (Doug Allen)
wrote:
[color=blue]
>I read the Avalon squeel post, I got it too!
>======================================
>
>'85 Celica GT, 297K miles, all stock:
>
>1. At weather temps below 45 degrees, engine starts normally, but has a
>high-pitched, screech/squeal noise. With the hood raised, the sound
>"seems" to be in the area near the fuel injection rail (?). If the gas
>pedal is quickly "stomped" and released, the noise stops. When the
>weather is warmer, no noise at start-up.[/color]

My '94 has a (adjustable) fuel pressure bypass valve ... i suppose
that could be noisy when cold.
[color=blue]
>2. Clue (?): When cold, the throttle pedal cable won't move freely, it
>"sticks," needs to be stepped-on to operate smoothly.[/color]

When was the last time u lubed the cable? Something thin.
[color=blue]
>3. Clue (?): When engine is cold, the engine RPMs will drop, almost
>stalling-out, when the brake pedal is pressed. But, engine operates fine
>when warmed-up. Plugs, wires, dist. cap & rotor are new. Any ideas?[/color]

This suggests a leak in the vacuum to the power brakes or the power
brake unit itself.

[color=blue]
>Thanks, da[/color]

hi JeB, thanks for the reply, I'll check-out your suggestions. da

======================================
My '94 has a (adjustable) fuel pressure bypass valve ... i suppose

This suggests a leak in the vacuum to the power brakes or the power
brake unit itself.